495540991 has 4 divisors (see below), whose sum is σ = 540590184. Its totient is φ = 450491800.

The previous prime is 495540953. The next prime is 495541019. The reversal of 495540991 is 199045594.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-495540991 is a prime.

It is a super-2 number, since 2×495540991² = 491121747522524162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495540091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22524580 + ... + 22524601.

It is an arithmetic number, because the mean of its divisors is an integer number (135147546).

Almost surely, 2^495540991 is an apocalyptic number.

495540991 is a deficient number, since it is larger than the sum of its proper divisors (45049193).

495540991 is a wasteful number, since it uses less digits than its factorization.

495540991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45049192.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 495540991 is about 22260.7500098267. The cubic root of 495540991 is about 791.3340654085.

The spelling of 495540991 in words is "four hundred ninety-five million, five hundred forty thousand, nine hundred ninety-one".